改性活化过硫酸盐应用及机理研究进展

Research progress on the application and mechanism of modified biochar activated persulfate

生物炭(BC)由于活化性能良好、成本低且绿色环保,已广泛应用于活化过硫酸盐(PS)去除水中难降解有机污染物。不同的改性修饰方法可以丰富BC表面活性位点,进一步增强BC的理化性质,提高活化性能与稳定性。首先,综述了BC应用于活化PS的改性方法;其次,总结了BC活化PS的反应活性位点,PS活化的自由基与非自由基途径及其差异;接着,分析了改性以及生物质原料对两种不同活化途径之间的转化影响;最后,展望了BC活化PS应用及机理研究的发展方向。

Biochar(BC)has been widely used for activation of persulfate(PS)to remove difficult-todegrade organic pollutants in water due to its good activation performance,low cost and environmental protection.Different modification methods can enrich the active sites on the surface of BC,further enhance the physicochemical properties of BC,and improve the activation performance and stability.Firstly,the modification methods of BC applied to activate PS are reviewed.Secondly,the reactive sites of BC activation of PS,the free radical and non-radical pathways of PS activation and their differences are summarized.Subsequently,the modification and the effect of biomass feedstock on the transformation between the two different activation pathways are analyzed.Finally,the development direction of BC activated PS application and mechanism research is pointed out.